DTC DETECTION LOGIC
DTC No. | Trouble diagnosis (Trouble diagnosis content) | DTC detecting condition | Possible cause |
P2096 | POST CAT FUEL TRIM SYS B1 (Post catalyst fuel trim systemtoo lean bank 1) | The output voltage computed by ECM from the A/F sensor 1 signa is shifts to the lean side for a specified period. |
|
P2097 | POST CAT FUEL TRIM SYS B1 (Post catalyst fuel trim systemtoo rich bank 1) | The A/F signal computed by ECM from the A/F sensor 1 signal is shifts to the rich side for a specified period. |
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
Is 1st trip DTC detected?
YES >> Go to EC, "Diagnosis Procedure".
NO >> INSPECTION END
1.CHECK GROUND CONNECTION
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.RETIGHTEN A/F SENSOR 1 AND HEATED OXYGEN SENSOR 2
Loosen and retighten the A/F sensor 1 and heated oxygen sensor 2. Refer to EM, "Exploded View" and EX, "Exploded View".
>> GO TO 3.
3.CHECK FOR EXHAUST GAS LEAK
Is exhaust gas leak detected?
YES >> Repair or replace.
NO >> GO TO 4.
4.CHECK FOR INTAKE AIR LEAK
Is intake air leak detected?
YES >> Repair or replace.
NO >> GO TO 5.
5.CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
Is the 1st trip DTC P0171 or P0172 detected? Is it difficult to start engine?
YES >> Perform trouble diagnosis for DTC P0171 or P0172. Refer to EC, "Diagnosis Procedure" or EC, "Diagnosis Procedure".
NO >> GO TO 6.
6.CHECK HARNESS CONNECTOR
Water should not exit.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace harness connector.
7.CHECK A/F SENSOR 1 POWER SUPPLY CIRCUIT
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 8.
8.DETECT MALFUNCTIONING PART
>> Repair or replace harness or connectors.
9.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
Is the inspection result normal?
YES >> GO TO 10.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
10.CHECK A/F SENSOR 1 HEATER
Refer to EC, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 11.
NO >> GO TO 13.
11.CHECK HEATED OXYGEN SENSOR 2
Refer to EC, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 12.
NO >> Replace malfunctioning heated oxygen sensor 2.
12.CHECK INTERMITTENT INCIDENT
Perform GI, "Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 13.
NO >> Repair or replace.
13.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace air fuel ratio (A/F) sensor 1. Refer to EM, "Exploded View".
CAUTION:
Do you have CONSULT?
YES >> GO TO 14.
NO >> GO TO 15.
14.CONFIRM A/F ADJUSTMENT DATA
With CONSULT
Is "0.000" displayed?
YES >> INSPECTION END
NO >> GO TO 15.
15.CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
Clear the mixture ratio self-learning value. Refer to EC, "Work Procedure".
Do you have CONSULT?
YES >> GO TO 16.
NO >> INSPECTION END
16.CONFIRM A/F ADJUSTMENT DATA
With CONSULT
>> INSPECTION END
Instrument panel
1. Headlight/turn signal switch/fog light
switch (if so equipped)
2. Driver's supplemental air bag (P. 1-39)
Horn
3. Meters and gauges. Warning and indicator lights
4. Wiper and washer switch
5. Vents
6. Rear window defroster switch
7. Front passenger air bag status light
8. Hazard warn ...
When traveling or registering in another country
When planning to drive your NISSAN vehicle
in another country, you should first find
out if the fuel available is suitable for your vehicle's
engine.
Using fuel with an octane rating that is too low
may cause engine damage. All gasoline vehicles
must be operated with unleaded gasoline. There ...